Permutation lock



u Junge 18, 1929. F. w. BAUMGARTH 1,717,956

PERMUTATION LOCK Filedv Ja. 9, 1928 aumento/s 70 l .n 5. 9 ,fr 7 1, 4 dumm,

CTI

Patented .lune 18, 1929.

UNITED STATES FREDRICK W. BAU'IVIGARTH, OF DETROIT, MLECHIGAN.

PERMUTATICN LOCK.

Application` filed January 9, 1928.

The present invention pertains to a novel permutation or combination lock, and the principal object is to provide a device ot this character which may be constructed oi' a comparatively small number of simple parts and yet atford a large number of combinations, only one ot which is correct. A 'further object et the invention is to apply the combination principle to household locks which are new commonly operated b y a key.

The device of the invention includes a plurality of rotatable disks having notches which are brought into registration on the proper setting et dials associated with the disks. The bolt of the lock has a portion or a finger adapted to enter the notches when in registration. The bolt however cannot be moved unless the linger enters the notches, and it is therefore necessary that the latter be brought into registration by exercise of the proper combina-tion before it is possible to withdraw the bolt.

The invention is fully disclosed by way ol example in the following description and f in the accompanying drawing, in which- Fig. l is an elevation et a lock designed for use as a door lock;

Fig. 2 is a sectional view thereof in a parallel plane, showing the bolt projected;

Fig. 8 is a similar section showing the bolt withdrawn 5 Fig. 4 is a transverse section on the line 4-4 of Figure l;

Fig. 5 is an elevation of a modification; and

Fig. 6 is a transverse section on the line 6 6 of Figure 5.

Reference to these views will now be made by use of like characters which are employed to designate corresponding parts throughout.

The form shown in Figures 1 to 4 is to be carried within a door after the fashion oi the conventional door lock. ln this case a casing or housing 35 is inserted and fixed within the door 36. The casing contains superposed notched disks 37 and 38, the former having a sleeve 39 extending beyond the face of the door and the latter having a stem 40 extending through the sleeve and beyond the free end thereof. To the face of the door is applied a plate 4l bearing indicia 42 ar-v ranged in a circular series around the center of the stem and sleeve. The exterior part of the sleeve 39 is squared and has iixed thereto a dial 43 resting on the plate 41. The extremity oi the stem is also squared as at 44 for receiving a dial 45 laid upon the dial 43.

Serial No. 245,317.

edge is formed with a projection or finger 49 adapted to enter the notches 50 of the disks when in registration with one another and in alignment with the path of the iinger. The bolt is normally projected by a compressed spring 5l inserted between the slide and the opposite wall of the casing and resting on lingers 52 and 53 projecting respectively from these parts.

rlhe operating means for the slide includes a lever 54 pivotally attached to the casing by a pin 55. The slide has a slot 56 receiving the pin in order to prevent obstruction of the movement of the slide. One end of the level' is adapted for engagement with a stud 57 formed on the slide. A cam 58 is also pivotally attached to the casing by a pin 59 and engages the other end of the lever. This pin is also received in a slot 60 formed in the slide for the purpose described in connection with the slot 56. Exteriorly of the casing, a iinger piece 6l is secured to the pin 59 for the purpose of actuating the cam 58. After the notches 50 have been brought into registration adjacent the finger 49, the cam 58 may be operated by the linger piece 6l to turn the lever 54 and thus move the slide an-d bolt to the position shown in Figure 3.

In Figures 5 and 6 is shown a modified construction wherein there is provided a single notched disk having a stein 7l carrying a dial 72 outside the casing. The dial cooperates with a lettered plate 73 mounted on the member 36 in the manner described in connection with Figure l. Apart from the fact that this modification requires the setting of only one dial, the operation is exactly as described With reference to Figures l to 4.

Although specific embodiments of the invention have been illustrated and described, it will be understood that various alterations in the details oi construction may be made without departing from the scope of the invention as indicated by the appended claims.

Vilhat I claim is l. A permutation lock comprising a easing,

ed therein, separate means outside ot the casing for turning said disks, a slide mounted in the easing and having a finger adapted to enter the notches ot the disks when in registration, a. lever pivoted to said easing` and adapted to move said sli-de, and a Cam pivoted in the easing` and adapted to swing said lever.

2. A permutation leek comprising a easing, a plurality ot notched disks rotatably mounted therein, separate means outside of the easing tor turning said disks, a slide mounted in the easing and having` a. tii er adapted to en ter the notches of the disks when in registration, a lever pivoted to said easing and adapted to move said slide, a cam pivoted in the easing` and adapted to swing said lever, and a linger piece outside the easing and operatively connected to said Cain.

3. A permutation leek comprising a easing, a plu 1ality of notched disks rotatably mountedA therein, separate means outside of the easing 'for turning said disks, a slide mounted in the casing and having a linger adapted tov engagement with said stud, and a cam pivoted in the ez sing and adapted to swing said lever.

il. A permutation leek comprising; a easing, a plurality of notched disks rotatably mounted therein, separate n'rea-ns-outside of the casing' tor turning sai-d disks, a slide mounted in the easingl and having' a. linger adapted to en-V ter 4the notches of the disks when in registration, a stud termed on said slide, a lever piv# oled to the easingand having one end in ene'ement with said stud, a Cain pivoted `in the casing and adapted to swing said lever, and a linger piece outside oi' said easing` and op eratively connected to said cam.

In testimony WhereoiQ I aHiX my signature.

FRIEDRICH lV. BAUMGrARTH.V 

